Members of Archaea & Bacteria that like to live in extreme environments are known as ____.

Extremophiles

Woese originally lumped archaea & bacteria together in the same category & called them Archaebacteria. What are the 2 reasons that has since been changed?

Not all members are extremophiles or related to them

They are not Bacteria--they are archaea

Which phyla is the largest & most diverse grp of species, includes many familiar gram-neg genera such as Escherichia as well as recognized human pathogens such as Shigella, Salmonella, Neisseria, Yersinia & Vibrio?

Proteobacteria

Animals having jointed appendages & a segmented body are known as ____.

The bacterial genus mycobacterium is related to gram pos bacteria however their cell wall is composed of a waxy lipid that is arranged in 2 layers covalently attached to the underlying peptidoglycan. This waxy lipid is known as?

Mycolic acid

Gram-pos or Gram-neg cell walls contain peptidoglycan?

Gram-pos - yes - thick

Gram-neg - yes - thin

Which gram walls contain teichoic acids?

Gram-pos

Which gram cell walls utilize and outer membrane?

Gram-neg

Which gram cell walls contain lippopolusaccharides (LPS)?

Gram-neg

Which gram cell walls have porin proteins?

Gram-neg

Which gram cell walls utilize a periplasm?

Gram-neg

Explain the lipid monolayer found in archaeal cells.

Fatty acid tails absent fr membranes & replaced by repeating 5-C units linked end to end to form lipid tails longer than fatty acid tails resulting in a monolayer rather than a bilayer